265949887 has 16 divisors (see below), whose sum is σ = 322313472. Its totient is φ = 214220160.

The previous prime is 265949869. The next prime is 265949909. The reversal of 265949887 is 788949562.

It is a de Polignac number, because none of the positive numbers 2^k-265949887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265949087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103812 + ... + 106342.

It is an arithmetic number, because the mean of its divisors is an integer number (20144592).

Almost surely, 2^265949887 is an apocalyptic number.

265949887 is a deficient number, since it is larger than the sum of its proper divisors (56363585).

265949887 is a wasteful number, since it uses less digits than its factorization.

265949887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3438.

The product of its digits is 8709120, while the sum is 58.

The square root of 265949887 is about 16307.9700453490. The cubic root of 265949887 is about 643.0823696205.

It can be divided in two parts, 26594 and 9887, that added together give a square (36481 = 191²).

The spelling of 265949887 in words is "two hundred sixty-five million, nine hundred forty-nine thousand, eight hundred eighty-seven".